The McMurdo minimally invasive rotary mastectomy procedure uses the McMurdo vacuum-assisted minimally invasive rotary mastectomy system to biopsy and excise breast lesions in a precise, minimally invasive and safe manner. The advantages of minimally invasive surgery include: 1. Precise localization and accurate excision of lesions: deep lesions and tiny tumors of only a few millimeters in diameter can be accurately excised, especially for lesions that can be detected by ultrasound but cannot be palpated by clinicians. 2.Small incision and good cosmetic effect: Compared with the incision of at least the same diameter as the lump in traditional surgery, the incision of McMurdo surgery is less than 5 mm and no suture is needed; moreover, multiple lesions in the same side of the breast can be removed through one incision, which has obvious advantages for deep breast masses and obese patients. 3.Hollow puncture needle design: only one puncture is performed throughout the surgery, avoiding needle tract metastasis caused by repeated multiple punctures for tumor cell shedding. 4. Biopsy of suspicious lesions can obtain sufficient and continuous specimens, and the sample volume taken in one puncture is several times of that of traditional hollow thick needle, which reduces the false-negative rate of pathological biopsy. 5, low infection rate: conventional surgical incision surgical sutures as foreign bodies remain in the incision, which may increase the chance of incision infection and poor healing; McMerton surgery exposure is small, without any foreign body residue in the body, the risk of infection is significantly reduced. McMerton surgery is generally indicated for benign breast masses less than 3 cm in diameter, asymmetric density, multifocal lesions, microcalcified foci and breast masses of unknown pathological nature that require excisional biopsy. For breast masses larger than 3 cm in diameter, the chance of postoperative tumor residuals with McMurdo surgery is increased and conventional open surgical excision is more recommended. Careful consideration should be given to masses located in the areola area and at a superficial depth. Young infertile patients should weigh the possibility of intraglandular ductal injury and should not ignore the impact on future lactation function by simply pursuing minimally invasive aesthetics.